updated the graph call

app.py

@@ -13,21 +13,18 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
 # --- Basic Agent Definition ---
 class BasicAgent:
-    """LangGraph Agent Wrapper"""
-    
+    """A langgraph agent."""
     def __init__(self):
         print("BasicAgent initialized.")
-        self.graph = graph  # Using graph already compiled in agent.py
-        
+        self.graph = build_graph()
+
     def __call__(self, question: str) -> str:
+        print(f"Agent received question (first 50 chars): {question[:50]}...")
+        # Wrap the question in a HumanMessage from langchain_core
         messages = [HumanMessage(content=question)]
-        result = self.graph.invoke({"messages": messages})
-        final_response = result['messages'][-1].content
-        
-        # Assumes answer starts with "FINAL ANSWER: "
-        if final_response.startswith("FINAL ANSWER: "):
-            return final_response[len("FINAL ANSWER: "):].strip()
-        return final_response.strip()
+        messages = self.graph.invoke({"messages": messages})
+        answer = messages['messages'][-1].content
+        return answer[14:]
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """